#include <iostream>

int main()
{
    unsigned u =10, u2 = 42;
    std::cout<<u2 - u <<std::endl;
    std::cout<<u-u2<<std::endl;

    int i =10, i2 =42;
    std::cout<<i2 - i<<std::endl;
    std::cout<<i - i2 <<std::endl;
    std::cout<<i - u<<std::endl;
    std::cout<<u - i<<std::endl;
}
